(default_compilers): Generate and use .ii files in the intermediate

stage of compiling C++ source.

From-SVN: r6553

gcc/gcc.c

@@ -563,8 +563,8 @@ static struct compiler default_compilers[] =
         %c %{O*:%{!O0:-D__OPTIMIZE__}} %{traditional} %{ftraditional:-traditional}\
         %{traditional-cpp:-traditional} %{trigraphs}\
 	%{g*} %{W*} %{w} %{pedantic*} %{H} %{d*} %C %{D*} %{U*} %{i*}\
-        %i %{!M:%{!MM:%{!E:%{!pipe:%g.i}}}}%{E:%W{o*}}%{M:%W{o*}}%{MM:%W{o*}} |\n",
-   "%{!M:%{!MM:%{!E:cc1plus %{!pipe:%g.i} %1 %2\
+        %i %{!M:%{!MM:%{!E:%{!pipe:%g.ii}}}}%{E:%W{o*}}%{M:%W{o*}}%{MM:%W{o*}} |\n",
+   "%{!M:%{!MM:%{!E:cc1plus %{!pipe:%g.ii} %1 %2\
 		   %{!Q:-quiet} -dumpbase %b.cc %{d*} %{m*} %{a}\
 		   %{g*} %{O*} %{W*} %{w} %{pedantic*} %{ansi} %{traditional}\
 		   %{v:-version} %{pg:-p} %{p} %{f*} %{+e*}\